Why service annually?
Every major manufacturer (Worcester Bosch, Vaillant, Ideal, Baxi, Viessmann) requires annual servicing to keep the 5–12 year warranty valid. Skipping a year can void the warranty even if the boiler is only 3 years old.
When to book
Spring to early autumn (April–September) is ideal. Engineers have more availability, prices are more stable, and any faults are caught before the winter heating season starts. Booking in December risks a longer wait — we prioritise no-heat callouts.
What's included in a proper service
Visual inspection of casing, seals, flue and pipework. Calibrated flue gas analysis for combustion efficiency and CO. Gas inlet and burner pressure checks. Safety device testing (overheat, PRV, flame supervision). Controls, thermostat and TRV checks. System pressure and expansion vessel checks. Written service record for warranty and landlord files.
Cost
£70–£100 fixed price across Kingston and the wider KT/TW postcodes. Combining with a Gas Safety Certificate saves on a second visit — see our gas-safety-certificate-cost guide.
Book your fixed-price annual service across Kingston, KT & TW today.
Call 07932 898534Frequently asked questions
What's the difference between a service and a Gas Safety Certificate?
A service maintains the boiler. A CP12 gas safety certificate is a legal inspection of all gas appliances and flues — required annually for rental properties, optional for homeowners.
How long does a service take?
Typically 45–75 minutes. Longer if there are faults to record or descaling recommendations to discuss.
Related pages
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Where possible, for urgent jobs